Establishing method of expanded diameter conductor strand jumping criterion

Abstract

The invention provides an establishing method of an expanded diameter conductor strand jumping criterion. The method comprises the steps of: determining structure parameters of an expanded diameter conductor, and establishing a corresponding finite element model; subjecting the expanded diameter conductor test piece to a pulley passing test; and establishing the expanded diameter conductor strand jumping criterion. The method provided in the invention solves the problems needing to be solved in expanded diameter conductor application in the prior art, and two section stability expanded diameter conductor structures are provided in the invention according to the method, thus solving the defects that a lot of tests are needed, an optimized conductor structure is likely to be missed, and a section stability expanded diameter conductor cannot be provided in relevant comparative literature. The specific structure parameters of the optimized expanded diameter conductor are provided. The structure parameter optimization process not only considers the influence factors mentioned in the literature "Key technology study on expanded diameter type aluminum cable steel reinforced for 750kV power transmission", and also comprehensively considers indentation, strand jumping critical tension and other factors of an expanded diameter conductor. Thus, the optimized structure is superior to the current local optimized structure acquired only by test, and is more in line with the objective law.

Description

technical field [0001] The invention belongs to the technical field of power transmission wires, and in particular relates to a method for establishing a strand-jumping criterion of an enlarged-diameter wire. Background technique [0002] Compared with the round wire concentric hinge overhead wire with basically the same cross section, the wire with enlarged outer diameter is called expanded diameter wire. Expanded wires are mainly divided into two types: support type expanded wires and loose twisted type expanded wires. The former generally refers to extruding high-density polyethylene outside the steel core to form a core wire with support and diameter expansion. The "Z" shaped aluminum wire is used on the outer layer, and the "S" shaped aluminum wire is used on the outer layer. A stranded wire; the latter is generally compared with a conventional concentric stranded overhead wire, and a few single wires are twisted adjacent to the outer layer and the inner layer to form ...

AI Technical Summary

Problems solved by technology

[0010] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a method for establishing the strand jump criterion of the expanded diameter wire, which solves the problems that need to be solved in the application of the expanded diameter wire in the prior art, and according to the method, two cross-sectional stable It solves the shortcomings of related comparative literature that requires a large number of experiments, may miss the optimized wire structure, and cannot give the cross-sectional stability of the expanded wire structure.

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